7. For every nature it is sufficient that it goes on its way, and prospers. The rational nature prospers while it assents to no false or uncertain opinion, while it directs its impulses to unselfish ends alone, while it aims its desires and aversions only at the things within its power, and while it welcomes with contentment all that universal Nature ordains. The nature of each of us is part of universal Nature, as the leaf is part of the tree; the leaf, indeed, is part of an insensible and unreasoning system which can be obstructed in its workings; but human nature is part of that universal system which cannot be impeded, and which is intelligent and just. Hence is meted out, suitably to all, our proper portions of time, of matter, of active principle, of powers, and of events. Yet look not to find that each several thing corresponds exactly with any other. Consider rather the whole nature and circumstances of the one, and compare them with the whole of the other. 8. You lack leisure for reading; but leisure to repress all insolence you do not lack. You have leisure to keep yourself superior to pleasure and pain and vain glory, to restrain all anger against the ungrateful, nay, even to lavish loving care upon them. 9. Let no man any more hear you railing on the life of the court; nay, revile it not to your own hearing. 10. Repentance is a self-reproving, because we have neglected something useful. Whatever is good must be useful in some sort, and worthy of the care of a good and honourable man. Now, such a man could never repent of neglecting some opportunity of pleasure. Pleasure, then, is neither useful nor good. 11. Of each thing ask: What is this in itself and by its constitution? What is its substance or matter? What is its cause? What is its business in the Universe? How long shall it endure? 12. When you are reluctant to be roused from sleep, remember that it accords with your constitution and with human nature to perform social actions. Sleep is common to us with the brutes. Now, whatever accords with the nature of each species must be most proper, most fitting, and most delightful to it. 13. Constantly, and, if possible, on every occasion, apply to your imaginations the methods of Physics, Ethics, and Dialectic. 14. Whomsoever you meet, say straightway to yourself:--What are this man's principles of good and evil? For if he holds this or that doctrine concerning pleasure and pain, and the causes thereof, concerning glory and infamy, death and life, it will seem to me neither strange nor wondrous that this or that should be his conduct. I shall bear in mind that he has no choice but to act so. 15. Remember that, as 'tis folly to be surprised that a fig-tree bears figs, so is it equal folly to be surprised that the Universe produces those things of which it was ever fruitful. It is folly in a physician to be surprised that a man has fallen into a fever; or in a pilot that the wind has turned against him.